bitwisenot: Difference between revisions
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(New page: ==Function band== Performs a bitwise 'and' operation of the {number} arguments by taking the binary representation of each of the numbers and performing the logical and operation on each o...) |
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==Function | ==Function bnot== | ||
Performs a bitwise ' | Performs a bitwise 'not' operation of the {number}. A bitwise not is performed by taking the binary representation of the {number} and performing a logical 'not' operation on each of these bits. | ||
'''Logical " | '''Logical "not" Table''' | ||
{| | {| | ||
| | |Bit || Result | ||
|- | |- | ||
|align=center| 0 || align=center| | |align=center| 0 || align=center| 1 | ||
|- | |- | ||
|align=center| 1 || align=center| 0 | |||
|} | |} | ||
Unfortunately its not quite as simple as the table above makes it appear since number are a string of 32 (or more bits) so a 1 in binary is actually a 00000000000000000000000000000001 and a 0 is actually a 00000000000000000000000000000000 so the table is now. | |||
bnot of binary 00000000000000000000000000000000 | |||
is 11111111111111111111111111111111 | |||
which is -1 in decimal | |||
bnot of binary 00000000000000000000000000000001 | |||
is 11111111111111111111111111111110 | |||
which is -2 in decimal | |||
If you are unsure why the results are negative then you can get more information by reading [[wp:Twos_complement|Twos_complement]] | |||
===Usage=== | ===Usage=== | ||
<source lang="mtmacro" line> | <source lang="mtmacro" line> | ||
[h: val = | [h: val = bnot(num)] | ||
[h: val = | [h: val = bitwisenot(num)] | ||
</source> | </source> | ||
===Examples=== | ===Examples=== | ||
<source lang="mtmacro" line> | <source lang="mtmacro" line> | ||
[ | [bnot(1)] | ||
</source> | </source> | ||
Returns 0. | Returns 0. | ||
<source lang="mtmacro" line> | <source lang="mtmacro" line> | ||
[r: | [r: bnot(1)] | ||
</source> | </source> | ||
Returns | Returns 0. | ||
<source lang="mtmacro" line> | <source lang="mtmacro" line> | ||
[r: | [r: bnot(12] | ||
</source> | </source> | ||
Returns | Returns -13. | ||
Revision as of 12:58, 1 December 2008
Function bnot
Performs a bitwise 'not' operation of the {number}. A bitwise not is performed by taking the binary representation of the {number} and performing a logical 'not' operation on each of these bits.
Logical "not" Table
| Bit | Result |
| 0 | 1 |
| 1 | 0 |
Unfortunately its not quite as simple as the table above makes it appear since number are a string of 32 (or more bits) so a 1 in binary is actually a 00000000000000000000000000000001 and a 0 is actually a 00000000000000000000000000000000 so the table is now.
bnot of binary 00000000000000000000000000000000
is 11111111111111111111111111111111
which is -1 in decimal
bnot of binary 00000000000000000000000000000001
is 11111111111111111111111111111110
which is -2 in decimal
If you are unsure why the results are negative then you can get more information by reading Twos_complement
Usage
[h: val = bnot(num)]
[h: val = bitwisenot(num)]Examples
[bnot(1)]Returns 0.
[r: bnot(1)]Returns 0.
[r: bnot(12]Returns -13.